I suggest it is more likely to be "Continental Europe".
The use of four outer bubbles and the rather "heavy / chunky" pontil mark with sloping "cutting in lines" is not usual for what I know of Paul Ysart's items.
Paul usually used six or eight outer bubbles in his harlequin designs. But four outer bubbles are known in some probable 1930s "harlequin" weights with two or three layers. And those normally had a white "ground" for each layer.